Table 3.
Adjusted absolute and relative effect of the answer sheet on drug use reports
| On Booklet | On Answer Sheet | |||||
|---|---|---|---|---|---|---|
|
| ||||||
| Adj. Prev. % (95%CI) | Coeff. of variation | Adj. Prev. % (95%CI) | Coeff. of variation | Prev. Diff. PP (IC95%)1 | PR (IC95%)2 | |
| Tobacco | ||||||
| Past year | 35.39 (31.14 – 39.64) | 5.24 | 35.71 (31.12 – 40.3) | 5.32 | 0.32 (−5.95 – 6.59) | 1.02 (0.86 – 1.21) |
| Past month | 22.74 (19.26 – 26.22) | 3.09 | 20.58 (16.71 – 24.44) | 2.71 | −2.17 (−7.36 – 3.03) | 0.93 (0.73 – 1.19) |
| Alcohol | ||||||
| Past year | 59.07 (53.84 – 64.30) | 5.82 | 63.11 (57.97 – 68.24) | 5.47 | 4.04 (−3.31 – 11.38) | 1.07 (0.95 – 1.20) |
| Past month | 34.21 (28.91 – 39.51) | 5.09 | 36.31 (31.08 – 41.55) | 5.33 | 2.1 (−5.35 – 9.55) | 1.06 (0.86 – 1.31) |
| Marijuana | ||||||
| Past year | 28.77 (24.53 – 33.01) | 4.25 | 32.57 (27.77 – 37.38) | 4.87 | 3.80 (−2.61 – 10.21) | 1.13 (0.92 – 1.39) |
| Past month | 16.54 (13.42 – 19.65) | 1.93 | 20.14 (16.71 – 23.57) | 2.63 | 3.60 (−1.02 – 8.23) | 1.21 (0.94 – 1.56) |
| Cocaine | ||||||
| Past year | 3.03 (2.01 – 4.05) | 0.07 | 6.31 (4.44 – 8.17) | 0.40 | 3.28 (1.22 – 5.34) | 2.52 (1.56 – 4.05) |
| Past month | 1.17 (0.60 – 1.74) | 0.01 | 3.31 (1.99 – 4.63) | 0.12 | 2.14 (0.77 – 3.51) | 3.37 (1.63 – 6.99) |
| Ecstasy | ||||||
| Past year | 1.11 (0.48 – 1.75) | 0.01 | 4.31 (2.65 – 5.98) | 0.19 | 3.20 (1.41 – 4.99) | 5.01 (2.40 – 10.45) |
| Past month | 0.75 (0.24 – 1.25) | 0.00 | 2.05 (1.28 – 2.82) | 0.05 | 1.30 (0.43 – 2.17) | 3.36 (1.38 – 8.21) |
| Relevón | ||||||
| Lifetime | 1.67 (0.82 – 2.51) | 0.02 | 5.88 (4.07 – 7.70) | 0.33 | 4.22 (2.43 – 6.01) | 4.78 (2.47 – 9.25) |
| Past year | 0.96 (0.36 – 1.55) | 0.01 | 3.85 (2.66 – 5.03) | 0.14 | 2.89 (1.63 – 4.15) | 4.89 (2.18 – 11.00) |
Adj. Prev.: Prevalence adjusted by gender and ethnic background; Coeff. of variation: Coefficient of variation ((Standard deviation/Mean) × 100). Prev. Diff: Prevalence difference adjusted by gender and ethnic background; PP: Percentage Points; PR: Prevalence Ratio adjusted by gender and ethnic background.
1
Estimated with a generalized linear models specifying a binomial distribution and Identity link function.
2
Estimated with a generalized linear models specifying a binomial distribution and Log link function.